Pump



J. P.. MONTGOMERY.

PUMP.

APPLICATION F|LED AUG.I8, 1919.

Patented June 20, 1922.

WITNESSES/ Mw# 7 www ATTORNEY TED raars JAMES P. MONTGOMERY, OF MOORE-OKLAHOMA, ASSIGNOR OF FORTY PER CENT TO CLEO H. BRAND, 0F MOORE, OKLAHOMA, AND TEN PER CENT TO JOHN G. LINDSAY,

0F NORMAN, OKLAHOMA.

PUMP.

Specification of Letters Patent.

Patented J une 20, 1922.

To all whom t may concern.'

Be it known that I, JAMES P. MONT- GOMERY, a citizen of thellnited States, residing at Moore, in the county of Cleveland and State of Oklahoma, have invented anew and useful Pump, of which the following is a specification. f

This invention has reference to pumps particularly to deep well pumps for pumping either oil or water, and its object is to Aprovide a balanced pump in which the force necessary to do the minished.

In accordance with the invention two reciprocatory cylinders are provided and are each carried by a pipe constituting a pump rod serving to reciprocate the cylinder and ut the Sametime conduct the pumped liquid. Each cylinder is entered by a pipe along pumping is greatly di.-

Which the cylinder moves axially and this` pipe is furnished with a check valve at the upper end. The pipe constitutes a stationary displacement piston and the water to be pumped enters the cylinder thro-ugh such displacement'piston. The upper end or head of each cylinder also is provided -with a check valve. Both check valves open upwardly. The area. of the lower head of the cylinder within the cylinder is such as to eX- ceed the area of the outlet at the upper end of the cylinder. p

The invention .will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawing forming part of this specification, with the understanding, however, that the invention is not confined to any strict conformity with the showing of the drawing, but may be changed andmodified so long as such changes and modiications mark no. material departure lfrom the salient features of the invention as expressed in the appended claims.

In the drawings Figure 1 is an elevation, with some, parts in section, of a pump installation embodying the invention, the well being of the deep well type.

Figure 2 is a longitudinal central section through the cylinder assembly, higher portions of the installation being omitted and the figure being on a larger scale than Figure 1.

Referring to the drawing, there is shown a well casing 1 which maybe taken as indicative of any suitable well structure, but particularly a deep well. It is customary to provide .deep wells with a tower 2 which may be utilized in connection with the pump structure of the invention.

The pump comprises two cylinders 3, 4 respectively, the cylinder 3 being carried by a pipe 5 and the cylinder 4 by a pipe 6, which pipes are continued above ground into the tower 2. The cylinders 8 and 4 are each provided with an upper head 7 and a lower head 8, the upper head being removable for access to the interior of the cylinder and the lower head being provided with an exte- 'riorly threaded neck 9 carrying aA packing .construction and hencel needs no particular description.

Entering the cylinder through the neck 9 ofthe lower head 8 isa pipe 12 surrounded by the .packing gland 10 so that the cylinder may move Aalong the pipe without leakage under conditions of use, the outer surface of the pipe being suitably machined to prevent wear of the packing material. The upper end of each pipe 12 is provided with a valve 13, which may be a ball valve, and the valve is maintained in place but is given sufficient play by a cage 14 which may be screwed or otherwise secured to the upper end of the pipe 12 within the cylinder. The check valve 11' may also contain a ball valve 15, but it is quite .feasible to substitute fiat valves for the ball valves. It is only necessary that the valve be of suitabletype for the purposes of the invention and ball and flat valves 'are both readily obtainable on the market and either type may be used.

Each pipe 12 is made fast to a support 16 situated in the well casing so vas to be below the cylinders 3 and 4, and these cylinders ymay be So located as to be immersed in the liquid the well. The pipes 12 may be screwed into the supports 16 and there secured by look nuts 17. The pipes 12 extend below the support and are there one secured. to each pipe 5 and and located in the tower 2 or at any other convenie'nt point. The rack bars mesh with a gear wheel 25 fast ony a shaft 25 having Journal supports 2o" 011 uprights 25 of the tower so that the pipes 5 and 6 and parts carried thereby and water contained therein are fully supported. Such structures may therefore reciprocate in the direction of theirlength with the expenditure of a mini-4 mum of power and are constrained to move together in opposite directions by means of the rack and gear wheel coupling. r1`he two pipes 5 and (i extend through guiding` boxes 26 in a pan 27 so as to catch water lifted from the wcll through the pipes 5 and 6 and escape from the outer ends thereof. jecting shield or flange 2o tops each pipe 5 and 6 to direct the flow from the pipes clear therefrom without running down the outsidcs of thc pipes. Any suitable means may be employed to causethe reciprocation of the cylinders. and in Figure 1 there is shown a pitman 28 fast to the upper end of the pipe 6 to indicate any appropriate driving means for the pipes. The liquid lifted by the pump into thc pan 27 finds ready escape therefrom by -way of a pipe 29. but this is also to be taken as indicative of pumped liquid.

In order to provide for easy working of the pump the area of the inner face of each head 8 about thc pipe 12 is made greater than the area of the outlet through the upper head of the cylinder. Moreover, the capacity of the check valve 13 is made sufficient to give ample flow of liquid from the pipe 12 into the cylinder 3 or 4. The same condition with respect to the freedom of ow of liquid through the check valve 11 is provided so that the pumps may work without retardation of How from resistance such as might be offered by the valves.

The pipes 12 acting as displacement pistons or plungers are upright plungers open at the top through check valves and freely communicating at the bottom with the liquid in the well. The pumping action is due to the rise and fall of the cylinders 3 and 4 with their check valves 11, and each cylinder balances the companion cylinder so that comparatively little power is needed for pumping.

An outwardly and downwardly pro-4 If it be assumed 'that the cylinder 8 has completed a stro-lie, and the cylinder 4 is A.

about to begin' a stroke, which stroke is downward, the pipe tS-accompanies the-cylinder 4 in the downward direction, and if it be further considcredthat the pipe 6 is full of water to its upper end, then the cylinder 4 will telescope on the displacement pipe 12, with the result that the valve 13 closes so that for the time being the pipe 12 may be considered as closed at the upper end, or as acting the same as a solid rod. .As the cylinder 4 drops, the water therein simply flows down over the top of the displacement piston 12, always in contactV with the inner facev of the head 8, until ultimately the displace ment piston 12 has reached its upper limit within the cylinder 4. Then the cylinder 4 is droppin it counterbalances the cylinder 3, and t e same is true of the pipes 5 and 6, the area of which pipes in cross section is substantially that of the displacement pipes 12.

So far as the action of the cylinder 4 with .respect to the displacement. pipe 12 within it, and the pipe 6 rising from'it, the result is the same as though the column of water immediately above the pipe 12 and throughout the cylinder 4 was a solid immovable icolumn rising through the cylinderV 4 and into the pipe 6 to the top thereof, so that when the cylinder 4 drops both the cylinder 4 and the pipe G telef-scopel over the pipe 12 and the flow is down around the same to and upon the head 5. The column of water corresponding` in varea to the pipe 6 simply overflows the top of the pipe 6 as the latter drops dow-n around the column of water and the upper e'nd of the column of water overflows the top of the pipe 6 without lifting the column of Water, whereby but a negligible amount of force is exerted.

What is claimed is:--

1. A pump comprising oppositely reciprocatory cylinders, oppositely reciprocatory pipes carrying and'actuating the cylinders and conducting fluid from the cylinders to a point of overflow, and static-nary displacement pistons each individual to and entering a cylinder through the center of the bottom head thereof and communicating with the liquid being pumped, the area ofthe bottom head of each cylinder within the latter and exterior to and around the piston being as large as the area Aof the outlet pipe of the respective cylinder, whereby the full weight of the Water in the cylinder and pipeacts upon the head on the down stroke.

2. A pump comprising oppositely reciprocatory'cylinders each with a discharge pipe rising therefrom at its upper end and carrying and actuating the cyhnder and also conducting fluid from `the cylinder, and a stationary displacement piston for each cylinder and comprising a pipe extending into the cylinder through the center of the bottom head thereoffor delivering liquid thereinto,

the area of the bottom head ofeach cylini on the downstroke.

der within the latter and 4exterior to and around the piston being as large as the area of the outlet pipe of the cylinder, each dis\ placement piston and outlet pipe of a cylinderH-having an upwardly opening check valve, the valve of the piston being located at the upper end thereof within the cylinder, whereby the full weight of the water in the cylindenand pipe acts upon the bottom head 7 V3. A'pump 'comprising `a support, means for sustaining the support at a low point in the well, pipes carried by the support and upstanding. therefrom and each provided with an upwardly opening checkyalve at its upper end, with said pipes held stationary and constituting displacement pistons, re'

' ciprocatory cylinders each having its lower head pierced at its center by and movable l so 'along a respective pipe, outlet pipes each lin the well, stationary pipes carried by the Support on opposite sides of anupright intermediate line and -upstanding from the support, upwardly opening check valves at the upper end'ofeach pipe, reciprocatory cylinders individual to and receiving the.

upper end of each pipe with' its valve and movable along the said pipes,4 outlet pipes connected to and reciprocating the cylinders and conducting liquid therefrom to the to of the well, and 'upwardly opening chec valves between the outlet plpes and thetops of the cylinders, the lower head of each cylinder whichispierced by the said stationary pipe at its ,center having an area outside of the stationary pipe greater than the area, of the outlet from the cylinder, whereby the full weight of the water in the 'cylinder acts y upon the saidhead in the downstroke'.

5. A pump having reciprocatory cylinders with outlet pipes connected to and rising from the cyllnders and serving as actuating and discharge pipes, and stationary displacement pistons over which the cylinders telescope, each piston being in spaced concentric relation to the inner wall of the reciprocatory cylinder by a distance deiining an area between them as great as that of the outlet pipe, whereby on the downstroke of the pump cylinder the column of water therein partlcipates in such downward movement and acts upon .the lower head of the cylinder outside ofthe stationary piston and thereby counterbalances the other cylinder and the water from the cylinder overiiows the upper end of the discharge pipe.

In testimony that I claim the foregoing as my own, I have hereto aiiiXed my si ature.

JAMES P. MONTGOM RY. Witnesses:

C. H. BRAND, S. A. PAYNE. 

